Asynchronous mode of timers

RE: Asynchronous mode of timers

Hung Bui — Mon, 27 Apr 2015 13:45:53 GMT

@kada: I think I know the issue. It was because you are using chip version 1. If you look at the nRF51822-PAN_v2.2.pdf you can find issue #39 "GPIOTE: 1V2 + HFCLK are requested always when the GPIOTE task is configured” this causes the current consumption of 1mA.

If you remove GPIOTE Task it should drop to 2.8 uA.

I suggest you to continue development with XLR3 chip (included in nRF51 DK PCA10028)

RE: Asynchronous mode of timers

kada — Sun, 26 Apr 2015 07:23:05 GMT

Just tested your code and I still have >1 mA current consumption. When I comment gpiote_init(); and counter_init(); function calls the current reduced to 2.8 uA. What is the problem? Thanks.

RE: Asynchronous mode of timers

Hung Bui — Fri, 24 Apr 2015 13:07:22 GMT

@kada: The counter only requires HFCLK when it is active when COUNT task is triggered, when IDLE it should not let the HFCLK running. I suspect that you may have something else that keep the clock running.

RE: Asynchronous mode of timers

kada — Fri, 24 Apr 2015 11:49:40 GMT

Thank you, Hung Bui. I'm using RFduino board programming it directly from Arduino IDE. Later I can check your code when installed Keil uvision. Also my chip version is QFAACA. But I didn't find anything related to increasing power consumption when running Timer in the PAN. I guess the Timer 0, 1, 2 is in the PCLK16M domain and when you start Timer even in counter mode the HFCLK source switched on.

RE: Asynchronous mode of timers

Hung Bui — Thu, 23 Apr 2015 12:48:11 GMT

@kada: I can't reproduce the high current consumption as you described. In my test it's about 4 uA when idle. I attached here the test code. It's tested on PCA10028. (please ignore RTC and lfclk code). SDK v8.0 Which chip version on your board ?

rtc - GPIOPORT_COUNTER.zip